Information processing system, information processing apparatus, and information processing method

Abstract

An information processing system includes a first information processing apparatus and a second information processing apparatus. The first information processing apparatus includes first circuitry. The first circuitry generates signature data for an update file based on a hash value obtained based on the update file and provide the update file. The second information processing apparatus includes second circuitry. The second circuitry obtains the update file and the signature data, verifies the update file with the signature data in updating a start-up file for the second information processing apparatus with the update file, updates the start-up file with the verified update file, generates, based on the hash value obtained based on the signature data, verification data for verifying the updated start-up file, and verifies the updated start-up file with the verification data in starting up the second information processing apparatus with the updated start-up file.

1 . An information processing system, comprising:
 a first information processing apparatus; and   a second information processing apparatus,   the first information processing apparatus including first circuitry configured to:
 generate signature data for an update file based on the update file; and 
   the second information processing apparatus including second circuitry configured to:
 obtain the update file and the signature data; 
 verify the update file with the signature data; 
 update a start-up file with the verified update file; 
 generate, based on the signature data, verification data for verifying the updated start-up file; and 
 verify the updated start-up file with the verification data. 
   
     
     
         2 . The information processing system of  claim 1 , wherein
 the verification data includes a hash value obtained based on the signature data.   
     
     
         3 . The information processing system of  claim 1 , wherein
 the second circuitry notifies an error in response to a verification result indicating that the update file is invalid.   
     
     
         4 . The information processing system of  claim 1 , wherein
 the second circuitry notifies an error in response to a verification result indicating that the updated start-up file is invalid.   
     
     
         5 . The information processing system of  claim 3 , wherein
 the second circuitry displays, on a display, an error notification screen for notifying the error.   
     
     
         6 . The information processing system of  claim 2 , wherein
 the hash value is calculated by the first information processing apparatus.   
     
     
         7 . An information processing apparatus, comprising circuitry configured to:
 obtain an update file and signature data from another information processing apparatus, the update file being for updating a start-up file for the information processing apparatus, the signature data being for verifying the update file;   verify the update file with the signature data;   update a start-up file with the verified update file;   generate, based on the signature data, verification data for verifying the updated start-up file, and   verify the updated start-up file with the verification data.   
     
     
         8 . The information processing apparatus of  claim 7 , wherein
 the verification data includes a hash value obtained based on the signature data.   
     
     
         9 . The information processing apparatus of  claim 7 , wherein
 the circuitry notifies an error in response to a verification result indicating that the update file is invalid.   
     
     
         10 . The information processing apparatus of  claim 7 , wherein
 the circuitry notifies an error in response to a verification result indicating that the updated start-up file is invalid.   
     
     
         11 . The information processing apparatus of  claim 9 , wherein
 the circuitry displays, on a display, an error notification screen for notifying the error.   
     
     
         12 . The information processing apparatus of  claim 8 , wherein
 the hash value is calculated by the another information processing apparatus.   
     
     
         13 . An information processing method performed by an information processing apparatus, the method comprising:
 obtaining an update file and signature data from another information processing apparatus, the update file being for updating a start-up file for the information processing apparatus, the signature data being for verifying the update file,   verifying the update file with the signature data;   updating a start-up file with the verified update file;   generating, based on the signature data, verification data for verifying the updated start-up file; and   verifying the updated start-up file with the verification data.   
     
     
         14 . The method of  claim 13 , wherein
 generating the verification data includes generating a hash value obtained based on the signature data.   
     
     
         15 . The method of  claim 13  further comprising:
 notifying an error in response to verifying the updated start-up file indicating that the update file is invalid. 
 
     
     
         16 . The method of  claim 15  wherein notifying further comprises:
 displaying an error notification screen for notifying the error. 
 
     
     
         17 . The method of  claim 13  further comprising:
 prior to verifying the update file with the signature data, decrypting the signature data using a private key.